Hepatic Lipidosis (Fatty Liver Disease)

Hepatic lipidosis is unique to cats and arises from a quirk of feline metabolism: cats evolved as obligate carnivores whose livers expect a constant stream of protein. Unlike dogs or humans, cats cannot effectively switch to fat metabolism during fasting. When the body is forced to mobilise fat from stores (as happens when a cat refuses food), the liver becomes overwhelmed. Fat droplets accumulate inside liver cells, distending them and disrupting normal function. The liver swells, becomes pale yellow and friable, and rapidly loses the ability to process toxins, produce essential proteins, and regulate metabolism.

The cruel irony is that the disease is self-perpetuating. As liver failure progresses, the cat develops profound nausea — making them even less willing to eat. Many owners only realise the severity when the cat begins to look yellow; by this stage, intensive care is essential and treatment is far harder.

Treatment hinges on one thing: getting calories into the cat reliably and consistently. Force-feeding by syringe rarely delivers enough volume and increases stress, which worsens the condition. The standard of care is a temporary feeding tube — either nasogastric (for short-term cases), oesophagostomy, or gastrostomy. These allow owners to deliver liquid feline diet at home several times a day without forcing the cat. Most cats tolerate feeding tubes remarkably well and rapidly return to eating voluntarily once the liver recovers.

The message for every cat owner: a cat that has stopped eating is a cat with a medical emergency unfolding, not one that is "just being fussy." The window for easy intervention is narrow — measured in days, not weeks.